SIMBAD references

2021MNRAS.505L..64B - Mon. Not. R. Astron. Soc., 505, L64-L68 (2021/July-3)

Hinting a dark matter nature of Sgr A* via the S-stars.

BECERRA-VERGARA E.A., ARGUELLES C.R., KRUT A., RUEDA J.A. and RUFFINI R.

Abstract (from CDS):

The motion data of the S-stars around the Galactic Centre gathered in the last 28 yr imply that Sgr A* hosts a supermassive compact object of about 4 ×106 M, a result awarded with the Nobel Prize in Physics 2020. A non-rotating black hole (BH) nature of Sgr A* has been uncritically adopted since the S-star orbits agree with Schwarzschild geometry geodesics. The orbit of S2 has served as a test of general relativity predictions such as the gravitational redshift and the relativistic precession. The central BH model is, however, challenged by the G2 post-peripassage motion and by the lack of observations on event-horizon-scale distances robustly pointing to its univocal presence. We have recently shown that the S2 and G2 astrometry data are better fitted by geodesics in the spacetime of a self-gravitating dark matter core-halo distribution of 56 keV-fermions, 'darkinos', which also explains the outer halo Galactic rotation curves. This letter confirms and extends this conclusion using the astrometry data of the 17 best-resolved S-stars, thereby strengthening the alternative nature of Sgr A* as a dense core of darkinos.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): Elementary particles - Dark matter

Simbad objects: 21

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2021.12.02-09:05:25

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